Well, considering I have a small library myself, it's surprising how hard it is for me to actually give titles...it's easier to give just authors. However, here goes... Anne McCaffrey's Pern series has to be my all time favorite, with the Dragonrider trilogy being the top. Mercedes Lackey's Vandamar series (with assorted other writers) Terry Pratchet's Discworld series Just about anything SciFi with emphasis on the old masters. Dean Koontz Tom Clancey some Robin Cook Patricia Cornwell's Kay Scarpetto books most mystery books. The occasional generic novel, very occasionally the romance novel (mostly because my best friend is a romance writer). When people ask me why I have so many books, I have to tell them the same thing. "Books are my friends." That's they way they feel...curling up with a good book is as satisfying as spending an evening with a good friend.